{"product_id":"bioscape-bioscape-tropic-air-pump-4000-twin-w2-check-valves","title":"Bioscape Tropic Air Pump 4000 Twin w\/2 Check Valves","description":"\u003cp\u003e\u003cstrong\u003eTwo adjustable airlines, tanks up to 300 litres.\u003c\/strong\u003e The Bioscape Tropic 4000 is a twin-outlet air pump with stepless flow control on each line — 360 litres of air an hour total, split and fine-tuned independently across two outlets. It's the pick when two air-driven devices need genuinely different flow rates, not just two lines running the same. Two check valves are included.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwin outlets, 360 L\/h total (180 L\/h per outlet)\u003c\/strong\u003e — enough for two sponge filters, airstones or ornaments running together.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStepless adjustable flow control on each outlet\u003c\/strong\u003e — dial each line up or down independently without adding back pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo check valves included\u003c\/strong\u003e — one per outlet, protecting against back-siphon.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4 W energy-efficient motor\u003c\/strong\u003e — low running cost for continuous, round-the-clock use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFreshwater and marine safe\u003c\/strong\u003e — suits community, planted and marine sump setups.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eTropic 4000\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutlets\u003c\/td\u003e\n\u003ctd\u003eTwin, with 2 check valves included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir output\u003c\/td\u003e\n\u003ctd\u003e360 L\/h total (approx. 180 L\/h per outlet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended tank size\u003c\/td\u003e\n\u003ctd\u003eUp to 300 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e4 W, 230 V \/ 50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.75 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed control\u003c\/td\u003e\n\u003ctd\u003eYes — stepless, independent per outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater type\u003c\/td\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eWhich Tropic air pump do I need?\u003c\/h3\u003e\u003cp\u003eThe 4000 shares its total output and tank-size rating with the Tropic 3000 — what it adds is control. If the two devices on your two lines need different flow rates (say, a deep airstone on one side and a shallow sponge filter on the other), the 4000's independent adjustment does that without pinching the line, which is the one thing that does add back pressure and shorten diaphragm life.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eOutlets\u003c\/th\u003e\n\u003cth\u003eOutput\u003c\/th\u003e\n\u003cth\u003eTank size\u003c\/th\u003e\n\u003cth\u003eSpeed control\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTropic 1000\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003ctd\u003e60 L\/h\u003c\/td\u003e\n\u003ctd\u003eUp to 45 L\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTropic 2000\u003c\/td\u003e\n\u003ctd\u003eSingle\u003c\/td\u003e\n\u003ctd\u003e138 L\/h\u003c\/td\u003e\n\u003ctd\u003e25–50 L\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTropic 3000\u003c\/td\u003e\n\u003ctd\u003eTwin\u003c\/td\u003e\n\u003ctd\u003e360 L\/h total\u003c\/td\u003e\n\u003ctd\u003e50–300 L\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTropic 4000\u003c\/td\u003e\n\u003ctd\u003eTwin\u003c\/td\u003e\n\u003ctd\u003e360 L\/h total\u003c\/td\u003e\n\u003ctd\u003eUp to 300 L\u003c\/td\u003e\n\u003ctd\u003eYes — stepless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003eIf both lines only ever need to run the same, fixed output, the Tropic 3000 does the same job without the extra dials.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for two airlines in a tank up to 300 L where each line needs its own flow rate — a mix of devices, uneven placement, or two tanks of different sizes off one pump. Not needed if both lines will always run identically — the fixed-output Tropic 3000 covers that case.\u003c\/p\u003e\u003ch3\u003eRunning costs\u003c\/h3\u003e\u003cp\u003eDraws 4 W. Run continuously, as aquarium air pumps typically are, that works out to roughly 35 kWh a year — around $10.50 a year assuming a 30c\/kWh electricity tariff. Actual cost depends on your own electricity plan.\u003c\/p\u003e\u003ch3\u003eSafety\u003c\/h3\u003e\u003cp\u003eMains-powered — position the pump above the aquarium's waterline where possible, and keep both check valves fitted if the pump sits at or below water level, to prevent back-siphon during a power outage.\u003c\/p\u003e\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\u003cp\u003eKeep the housing dry and the intake vents dust-free. Use the flow control to reduce output rather than pinching or kinking the airline — pinching adds back pressure that shortens diaphragm life. A drop in output despite the control being open usually means the diaphragm needs replacing; the Bioscape BIS54A replacement diaphragm (2-pack) is sold separately for this model.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered under Bioscape's manufacturer warranty against defects, in addition to your rights under Australian Consumer Law. Standard parcel delivery.\u003c\/p\u003e\u003ch3\u003eGoes well with\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirline tubing\u003c\/strong\u003e — enough to run both adjustable outlets to their airstones or filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAirstones, sponge filters or air-driven ornaments\u003c\/strong\u003e — mix and match, since each line adjusts independently.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplacement diaphragm (BIS54A, 2-pack)\u003c\/strong\u003e — the standard service part for this model.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eWhat does the flow control actually change?\u003c\/h4\u003e\u003cp\u003eIt adjusts the air output on each outlet independently, without adding back pressure the way pinching the airline would — useful when the two devices on your two lines need different amounts of air.\u003c\/p\u003e\u003ch4\u003eIs the 4000 quieter than the 3000?\u003c\/h4\u003e\u003cp\u003eBioscape markets both as quiet-running; no decibel figures are published for either model, so there's no measured difference to report.\u003c\/p\u003e\u003ch4\u003eHow much does it cost to run?\u003c\/h4\u003e\u003cp\u003eAt 4 W run continuously, expect roughly 35 kWh a year — about $10.50 annually at a 30c\/kWh tariff.\u003c\/p\u003e\u003ch4\u003eIs it reef safe?\u003c\/h4\u003e\u003cp\u003eYes, it's rated for freshwater and marine use, including marine sumps.\u003c\/p\u003e","brand":"Bioscape","offers":[{"title":"Default Title","offer_id":54774335635747,"sku":"BIS54","price":49.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/BIS54_9_b6c2898e-2069-44c8-81ea-8036c2a0de60.jpg?v=1782869004","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/bioscape-bioscape-tropic-air-pump-4000-twin-w2-check-valves","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}